隔离桩对盾构侧穿建筑物时基础变形的影响分析
发布时间:2018-08-31 09:39
【摘要】:以济南地铁R1线地下段盾构近穿某建筑物为背景,采用数值分析的方法对隔离桩不同参数进行逐一模拟。研究了隔离桩不同桩长、桩洞距及桩间距对建筑物基础位移控制的影响。研究表明,桩长越长,隔离效果越好;在一定范围内,桩洞距越小隔离效果越好;由于桩间土拱效应,桩间距减小至一定程度后,隔离效果改善不明显。经优化选取桩长为30 m、桩洞距为2.0 m、桩间距为1.2 m的隔离桩。相比未打设隔离桩的情况,优化取值的隔离桩后,建筑物基础水平位移可减小36.6%,竖向位移可减小33.1%。
[Abstract]:Taking the shield tunneling near a building in the underground section of Jinan Metro R1 Line as the background, the different parameters of the isolated pile are simulated one by using the numerical analysis method. The effects of different pile lengths, pile spacing and pile spacing on the displacement control of building foundation are studied. The results show that the longer the pile length, the better the isolation effect; in a certain range, the smaller the pile-hole spacing, the better the isolation effect; because of the soil arch effect between piles, when the pile spacing is reduced to a certain extent, the isolation effect is not obvious. The isolation piles with 30 m long, 2.0 m spacing and 1.2 m spacing are selected. The horizontal displacement of the building foundation can be reduced by 36.6 and the vertical displacement can be reduced by 33.1by optimizing the value of the isolated pile.
【作者单位】: 山东科技大学土木工程与建筑学院;济南轨道交通集团有限公司;
【分类号】:TU433;;U455,43
本文编号:2214602
[Abstract]:Taking the shield tunneling near a building in the underground section of Jinan Metro R1 Line as the background, the different parameters of the isolated pile are simulated one by using the numerical analysis method. The effects of different pile lengths, pile spacing and pile spacing on the displacement control of building foundation are studied. The results show that the longer the pile length, the better the isolation effect; in a certain range, the smaller the pile-hole spacing, the better the isolation effect; because of the soil arch effect between piles, when the pile spacing is reduced to a certain extent, the isolation effect is not obvious. The isolation piles with 30 m long, 2.0 m spacing and 1.2 m spacing are selected. The horizontal displacement of the building foundation can be reduced by 36.6 and the vertical displacement can be reduced by 33.1by optimizing the value of the isolated pile.
【作者单位】: 山东科技大学土木工程与建筑学院;济南轨道交通集团有限公司;
【分类号】:TU433;;U455,43
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